Disclosed is an updated browser having an API for communicating payment data between the browser and a site or an application and a software module for processing payments of purchases and to reduce the number of user interactions needed for a purchasing process. The method includes receiving, via the user interface, an interaction by a user with an object associated with a site, the interaction indicating a user intent to make a purchase, receiving, based on the interaction and via an application programming interface, a request from the site or application for payment data in connection with the purchase and transmitting, to the site or the application and via the application programming interface, the payment data, wherein the payment data confirms the purchase or can be used to process or deliver a product associated with the purchase.